The average female cod produces two million eggs in a single spawning; however, only about 200 of the original two million cod survive to age one. when cod reach their reproductive age of two to four years, only two of the original two million are still alive. what can you conclude about the traits of the two cod that survived?

The traits of the two cod that survived are advantageous, giving them a reproductive advantage. Also, these traits have strong selective (evolutionary) pressure. Selective pressure refers to any cause that tends to reduce reproductive success in a population. Traits that mitigate the effects of selective pressure can become widely spread through a population.

one characteristic that is shared by all is a soft body. many

of these invertebrate animals also have an outer shell to protect their

body. oysters, clams, snails, and mussels are all mollusks. so are octopuses, squids, and slugs. mollusks live on land and in freshwater.

the diploid number of chromosomes is sometimes represented by the symbol 2n. for the fruit fly, the diploid number is 8, which can be written as 2n = 8, where n represents twice the number of chromosomes in a sperm or egg cell.